Hot water tank

Abstract

A hot water storage tank (10) is provided with a storage container (100), a cold water connection (11), a hot water connection (12), and an electrical connection compartment (200). The electrical connection compartment (200) is formed by a storage container base (210) made of plastic and by a cover (220) made of plastic. The cover (220) has a first cover recess (221) with connection sides (221a). The storage tank base (210) has a base section (210a) with two base sides (210b). A labyrinth (230) is formed at the transition between the connection sides (221a) and the base sides (210b). The base sides (210b) have first and second base webs (210c, 210d) with a base recess (210e) in between. The connection sides (221a) have a first and second cover web (225, 226) with a cover recess (227) therebetween.The first base web (210c) is received in the cover recess (227), and the second cover web (226) is received in the base recess (210e). The labyrinth (230) is formed by the first and second base webs (210c, 210d) with a base recess (210e) therebetween, and by the first and second cover webs (225, 226) with a cover recess (227) therebetween.

Description

The present invention relates to a hot water storage tank.A hot water storage device typically has a storage container and an electrically operated heating unit. The hot water storage device has a cold water connection as an input connection and a hot water connection as an output connection as well as electrical connections for the electrical heating unit.EP 3 315 872 A2 shows a hot water storage device with a storage container with a cold water connection as well as a hot water connection and an electrical heating flange. The electrical connections and the hot water connection and the cold water connection are provided in the lower region of the hot water reservoir and can be part of a heating flange.It is an object of the invention to provide a hot water storage tank with an improved spray protection.This object is achieved by a hot water storage device according to claim 1.Thus, a hot water storage device is provided with a storage container, a cold water connection, a hot water connection and an electrical connection space. The electrical connection space is formed by a storage container base made of plastic and by a cover made of plastic. The cover has a cover recess with connection sides. The storage floor has a floor portion with two floor sides. At the transition between the connection sides and the bottom sides, a labyrinth is formed. The bottom sides include first and second bottom webs with a bottom recess therebetween. The terminal sides include first and second cover webs with a cover recess therebetween. The first bottom web is received in the cover recess and the second cover web is received in the bottom recess. The labyrinth is formed by the first and second bottom webs with the bottom recess therebetween and by the first and second cover webs with the cover recess therebetween.This ensures that splash protection according to IP 25 is achieved even in the region between the floor portion and the cover.Furthermore, the configuration of the labyrinth makes it possible to ensure that the cover, when it is fastened to the storage floor or another part of the hot water storage unit, for example, by means of screws, cannot be removed in a non-destructive and intentional manner. This makes it possible to prevent unauthorized removal of the cover and any intervention in the electrical connection space.The labyrinth can thus represent a mechanical safety device against unauthorized removal of the cover.In one aspect, a protrusion is disposed on the first cover web. The bottom recess is then designed to be so wide that the first cover web fits in with the projection.According to a further aspect, the second bottom web has at least partially a projection.According to a further aspect, two sections are arranged in the region between the base section and the connection sides of the cover, wherein one section is provided in the lower region. In the other region adjoining at the top, the second bottom web has the projection.A hot water storage device with a storage container, a cold water connection, a hot water connection, and a heating flange with electrical contacts is thus provided. The hot water storage device has an electrical connection space in which the electrical contacts of the heating flange can be connected to an input current cable, for example, via connection terminals. The electrical connection space is formed by a storage container base made of plastic and by a cover made of plastic. The electrical connection space is accordingly formed by the plastic cover, the storage container base and a lower side of the heating flange.Further embodiments of the invention are the subject matter of the dependent claims.Advantages and exemplary embodiments are explained in more detail below with reference to the drawings. FIG. 1 shows a perspective view of a hot water storage tank, FIG. 2 shows a perspective view of an electrical connection space of a hot water storage tank, FIG. 3A shows a schematic detail of a cover and a protrusion of an electrical connection space, FIG. 3B shows a further schematic detail of a cover and a protrusion of an electrical connection space, FIG. 3C each shows a cross section of a connection between and 3D projection and cover, and FIG. 4 shows a schematic cross section of a connection between projection and cover.FIG. 1 shows a perspective view of a hot water storage tank. The hot water storage device 10 has a storage container 100, an electrical connection space 200, a cold water connection 11, and a hot water connection 12. The hot water storage device 10 can be connected to an energy supply network via an electrical supply line 13. The electric connection space 200 may be provided at the lower end of the heat storage 10. The storage container 100 may be arranged on a storage floor 210 made of plastic. The storage floor 210 forms an upper end or the ceiling of the electric connection space 200, and the cover 200 made of plastic closes the electric connection space 200, for example, downward and sideways. The electrical connection space 200 is therefore substantially surrounded by a plastic housing.Optionally, a display 14 can be provided in the region of the electrical connection space 200. The display 14 may be connected to the storage floor 210.FIG. 2 shows a perspective view of an electrical connection space of a hot water storage tank. The hot water storage device 10 has a storage container 100 and an electrical connection space 200. The electric connection space 200 may be provided at the lower end of the heat storage 10. The storage container 100 may be arranged on a storage floor 210 made of plastic. The storage floor 210 forms an upper end or the ceiling of the electric connection space 200, and the cover 200 closes the electric connection space 200, for example, downward. In FIG. 2, the cover 220 is shown partially disassembled. The cover 220 may be fixed to the storage floor 210 or to a bottom portion 210 aof the storage floor 210, for example, by screws 220 a. A display 14 may be provided on the bottom portion 210 a. The bottom portion 210 amay protrude from a plane of the storage floor 210. This is advantageous because it contributes to stabilization of the cover 220 in the assembled state.The cover 220 has a first recess 221. The protruding bottom portion 210 amatches into the first recess 221 when the cover 220 is attached to the storage floor 210 as shown in FIG. 2. The first recess 221 and the bottom section 210 bform a labyrinth 230 at their transition in order to ensure a splash resistance according to IP 25.FIG. 3A shows a schematic detail of a cover and a protrusion of an electrical connection space. In FIG. 3A, a detail of the bottom portion 210 aand the cover 220 is shown in the non-mounted state. FIG. 3B shows a detail of the bottom section 210 aand of the cover 220 of FIG. 3A in the mounted state. In FIG. 3C, a cross section A of FIG. 3B is shown, and in FIG. 3C, a cross section B of FIG. 3B is shown.In the assembled state, the transition from the cover 220 to the bottom portion 210 aconstitutes a labyrinth 230. In other words, the terminal sides 221 aof the cover 220 and an end of the bottom portion 210 atogether form the labyrinth 230 to improve a splash resistance of the electric connection space 200.The cover 220 has, on its connection sides 221 atoward the base portion 210 a, a first connection side portion 228 and optionally a second connection side portion 229. In the first terminal side portion 228, the terminal side 221 aincludes first and second cover ridges 225, 226 with a cover recess 227 therebetween. In the second terminal side portion 229, the terminal side 221 aincludes first and second cover ridges 225, 226 with a cover recess 227 therebetween. A protrusion 228 may be provided on the second cover web 226. The end of the second cover web 226 may thus be thicker than the end of the first cover web 225. The first cover web 225 may represent an outer cover web 225, while the second cover web 226 may represent an inner cover web 226.The bottom portion 210 amay have two bottom sides 210 bwhich may cooperate with the terminal sides 221 aof the cover 220 to form a labyrinth 230. The bottom sides 210b have bottom webs 210c, 210d with a bottom recess 210e therebetween. The first bottom rib 210 cmay be inserted into the cover recess 227. The second cover web 226 may be inserted into the bottom recess 210 e.In the second connection side section 229, the second bottom web web 210 dhas a projection 210 fwhich at least partially protrudes into the bottom recess 210 e.The first terminal side portion 228 is provided in the lower region of the electrical connection space 200, and the second terminal side portion 229 adjoins the first terminal side portion 228.FIG. 4 shows a schematic cross section of a connection between projection and cover. The cover 220 includes first and second cover webs 225, 236 in the first terminal side portion 228 with a cover recess 226 therebetween. A protrusion 228 is provided on the second cover web 226. The bottom portion 210a has first and second bottom lands 210c, 210d in the first terminal side portion 228 with a bottom recess 210c therebetween. The first bottom web 210 cis received in the cover recess 227 and the second cover web 226 is received in the bottom recess 210 e.In the second terminal side portion 229, the second bottom land 210 dfurther includes the protrusion 210 f.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 3 315 872 A2

[0003]

Claims

A hot water storage (10) comprising a storage container (100), a cold water connection (11), a hot water connection (12) and an electrical connection space (200), wherein the electrical connection space (200) is formed by a storage container base (210) made of plastic and by a cover (220) made of plastic, wherein the cover (220) has a first cover recess (221) with connection sides (221a), wherein the storage base (210) has a base portion (210a) with two base sides (210b), wherein a labyrinth (230) is formed at the transition between the connection sides (221a) and the base sides (210b), wherein the base sides (210b) have a first and second base web (210c, 210d) with a base recess (210e) therebetween, wherein the terminal sides (221a) have first and second cover webs (225, 226) with a cover recess (227) therebetween, the first bottom web (210c) being received in the cover recess (227) and the second cover web (226) being received in the bottom recess (210e), the labyrinth (230) being formed by the first and second bottom webs (210c, 210d) with a bottom recess (210e) therebetween and by the first and second cover webs (225, 226) with a cover recess (227) therebetween.The hot water reservoir (10) of claim 1, wherein a protrusion (228) is disposed on the first cover web (225), wherein the bottom recess (210e) is configured wide enough that the first cover web (225) fits within the protrusion (228).The hot water reservoir (10) of claim 1 or 2, wherein the second bottom web (210d) at least partially includes a protrusion (210f).The hot water storage (10) according to claim 3, wherein the labyrinth (230) has, between the bottom portion (210a) and the cover (220), first and second connection side portions (228, 229), wherein the first connection side portion (228) is provided in the lower region of the electrical connection space (200), wherein the second bottom web (210d) has the first protrusion (210f) in the second connection side portion (229).Hot water storage (10) according to one of claims 1 to 4, wherein the labyrinth represents a mechanical safety device against unauthorized removal of the cover, in particular towards the front.

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